If you use enough AI, you can control estrogen and water retention. Prop can be "drier" just because it builds up less so there is less conversion. But that level of conversion can be mimicked through estrgoen mgnt. 1mg EOD adex should be good. And if endurance is your prime focus, you can get away with much less gear than bodybuilding doses. For instance, in BB, a male might used 50-100mg of var. But I have known track athletes to have really good expereinces with 30mg of var only. So keep that in mind. Lower doses will lead to less mineral retention and therefore, less water weight. Any of the DHTs will produce less water. EQ is great for increased RBC but can also cause water retention. It converts to estrgoen about 50% as much as test so it can be managed. I'd try that, using a small amount of test, like 300mg or so, with 300mg EQ. It will take a month to build up but it will work well for endurance